/*!	 synfig/rendering/opengl/internal/sampler.cpp
**	 Sampler
**
**	......... ... 2015 Ivan Mahonin
**
**	This package is free software; you can redistribute it and/or
**	modify it under the terms of the GNU General Public License as
**	published by the Free Software Foundation; either version 2 of
**	the License, or (at your option) any later version.
**
**	This package is distributed in the hope that it will be useful,
**	but WITHOUT ANY WARRANTY; without even the implied warranty of
**	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
**	General Public License for more details.
**
*/

#ifdef USING_PCH
#	include "pch.h"
#else
#ifdef HAVE_CONFIG_H
#	include <config.h>
#endif

#ifndef _WIN32
#include <unistd.h>
#include <sys/types.h>
#include <signal.h>
#endif

#include "samplers.h"

#endif

using namespace synfig;
using namespace rendering;

gl::Samplers::Samplers(Context &context):
    context(context),
    nearest(),
    linear()
{
    Context::Lock lock(context);
    glGenSamplers(1, &nearest);
    glSamplerParameteri(nearest, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glSamplerParameteri(nearest, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    // glSamplerParameteri(nearest, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    // glSamplerParameteri(nearest, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    context.check();

    glGenSamplers(1, &linear);
    glSamplerParameteri(linear, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glSamplerParameteri(linear, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    // glSamplerParameteri(linear, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    // glSamplerParameteri(linear, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    context.check();
}

gl::Samplers::~Samplers()
{
    Context::Lock lock(context);
    glDeleteSamplers(1, &linear);
    glDeleteSamplers(1, &nearest);
}

GLuint
gl::Samplers::get_interpolation(Color::Interpolation interpolation)
{
    switch (interpolation) {
    case Color::INTERPOLATION_LINEAR:
        return get_linear();
        break;

    default:
        break;
    }

    return get_nearest();
}